This article examines evaluation intervention influence on programme performance through surveys, qualitative evaluation, questionnaires, interviews and test scores. The study uses quantitative (SPANOVA and MANOVA) and qualitative (the constant comparative method) data analysis, together with examining practical significance through effect size and power analysis. Major findings show positive contributions of evaluation intervention to quality management, teacher pedagogical skills and student learning outcomes (SLOs). Quantitative and qualitative findings, however, diverge regarding evaluation impact on programme research. A positive transfer of evaluation ownership discourse from decision-maker to implementer stakeholders has been observed. The study recommends evaluation intervention for programme, institutional and individual development alongside quality improvement.